Meet scientists describing their fascination with moons. Discuss the implications of finding life on a moon. Meet Jessica, your course guide. Take a tour through the Solar System and find out how much you already know about moons.

Learn about orbits and rotation of moons. Find out what sorts of bodies can have moons. Learn about the Moon's phases, and apply what you have learned to a question about the crescent Moon seen from the Equator.

Explore the origins of moons, including Earth's Moon, and how moons influence other bodies. Find out how tidal forces can keep moons geologically active.

Like planets, moons can have an internal layered structure: a core, mantle and crust. At Jupiter and beyond, the outer part of each moon is ice that behaves like rock. How do moons get their names?

Galileo discovered lunar craters in the 1600s but the debate about how they were formed was resolved only in the 20th century. Learn how different crater shapes and sizes come about, and have a go at classifying real Moon craters.

Watch an impact on the Moon in March 2013, one of hundreds detected by a NASA-led initiative since 2005. What determines crater size? Choose different impactor and target properties, and see what happens!

Find out about ancient volcanism on the Moon and elsewhere, as well as present-day hot volcanism on Io and icy volcanism on Enceladus. Discover the heat source that keeps such small bodies active.

Explore Europa, Jupiter's icy moon that probably has an ocean below the surface. Could there be life there?

Small moons have too little gravity to pull themselves into spherical shape. Meet the tiny moons of Mars, moons orbiting asteroids, Saturn’s diverse moons (big and small), and gear up for the first visit to Pluto's moons.

Introducing the only moon you can see with the naked eye, how does it measure up against the others, what’s under the surface and how far away is it? What did early missions to the Moon discover, and why would we want to return?

Learn about the space race, and one of the iconic moments in history when humankind first stood on the Moon. See what it was like to walk on the Moon and some experiments the astronauts undertook, like the ‘hammer and feather'.

The astronauts really did risk their lives, as Apollo 13 demonstrated, but they successfully landed and returned six times. Moon rock amounting to 382 kg was returned to Earth and stored in special conditions for scientific study.

Rocks are the key evidence for the Moon’s story. The meteorite-battered lunar highland rocks are more ancient than anything on Earth, and the ancient volcanoes on the Moon are better preserved than many modern volcanoes on Earth.

The Moon rocks are stored at NASA, apart from fragments loaned to scientists for study. However the virtual microscope makes it possible to study Moon rocks up close and discover for yourself what they can teach us about the Moon.

How much do we know of the history of the Moon? Scientists have used both cratering density and direct dating of Moon rocks to measure the ages of events on the Moon including periods of heavy meteorite bombardment, and volcanism.

Scientists had long debated the presence of water, but the Apollo missions appeared to settle the matter – the Moon rocks were dry. In the few cases where water was detected, it appeared to be terrestrial contamination.

After the Apollo missions the debate over water on the Moon continued. Satellites orbiting the Moon in the last few years have discovered tiny amounts of water in ice within craters at the poles and locked up in rare minerals.

The discovery of water was significant to more than a few academics. Water is key to human life and as a potential fuel. The presence does open new opportunities for habitation and long-distance space travel.

Find out about the missions that gave us our first close-up views of distant moons: Voyagers 1 and 2, Galileo and Cassini-Huygens. Learn why probes are crashed into giant planets rather than risk crashing into a moon.

Titan is the only moon on which we have landed a probe, apart from our own Moon, and it has a dense atmosphere which makes it hard to see the surface from orbit.

Compare Rhea, Miranda and Ariel - three varied icy moons.

What does, or should, the future hold for moons exploration?

How can life be defined and detected? What conditions does life require? Which moons are most likely to contain habitable environments?

Thoughts on moons, and that all-important end-of-course test.